Error: Requested resource does not exist

Question

Hi
I am using a J2EE application to connect to R/3. I am receiving the above mentioned error. I created a Web Module project. In that i created a package com.training.examples.servlet.GetSalesPage.java . This is going to be my controller.
I also created a JSP page with a submit button. Once i click on the button, i get the following message "  The requested resource does not exist."
In the JSP page i used the follwing Tag :
<form action="<%= request.getContextPath() %>/servlet/GetSalesPage" method="POST">
I know this is will be tough to understand with me just giving me a bigger picture. I am ready to give the code if anyone wishes to check it out also.
Any help would be rewarded.
Murali.

Answer 1

Hi
Thanks Vyara and Guru. I am actually trying to replicate the example of "Creating first J2EE application - flight bookings". So i am getting stuck with the basic things.
Ur inputs were valuable.
I added the Servlet in the Web.xml
Here is my Web.XML
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
                         "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
    <display-name>WEB APP</display-name>
    <description>WEB APP description</description>
      <servlet>
        <servlet-name>GetSalesPage</servlet-name>
        <servlet-class>com.training.examples.servlet.GetSalesPage</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>GetSalesList.jsp</servlet-name>
        <jsp-file>/GetSalesList.jsp</jsp-file>
    </servlet>
    <ejb-ref>
        <ejb-ref-name>ejb/SalesEJBBean</ejb-ref-name>
        <ejb-ref-type>Session</ejb-ref-type>
        <home>com.training.examples.SalesEJBHome</home>
        <remote>com.training.examples.SalesEJB</remote>
        <ejb-link>SalesBean</ejb-link>
    </ejb-ref>
</web-app>
Here is ejb-jar.xml in my EJB Project
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
<ejb-jar>
     <description>EJB JAR description</description>
     <display-name>EJB JAR</display-name>
     <enterprise-beans>
          <session>
               <ejb-name>SalesEJBBean</ejb-name>
               <home>com.training.examples.SalesEJBHome</home>
               <remote>com.training.examples.SalesEJB</remote>
               <local-home>com.training.examples.SalesEJBLocalHome</local-home>
               <local>com.training.examples.SalesEJBLocal</local>
               <ejb-class>com.training.examples.SalesEJBBean</ejb-class>
               <session-type>Stateless</session-type>
               <transaction-type>Bean</transaction-type>
               <resource-ref>
                    <res-ref-name>eis/SAPJRADemoFactory</res-ref-name>
                    <res-type>javax.resource.cci.ConnectionFactory</res-type>
                    <res-auth>Container</res-auth>
                    <res-sharing-scope>Shareable</res-sharing-scope>
               </resource-ref>
          </session>
     </enterprise-beans>
</ejb-jar>
Now i am able to get the JSP page. When i key in data and click on submit button, i get the following error:
<b>
"Couldn't access bean salesEJB: Path to object does not exist at java:comp, the whole lookup name is java:comp/env/ejb/SalesEJB"</b>
I have setup eis/SAPJRADemoFactory for my Flight Application and it is working fine. I am trying to use the same setting for my application also.
Here is my GetSalesPage SERVLET Page :
Created on May 9, 2006
To change the template for this generated file go to
Window&gt;Preferences&gt;Java&gt;Code Generation&gt;Code and Comments
package com.training.examples.servlet;
import java.io.IOException;
import java.rmi.RemoteException;
import java.util.List;
import javax.ejb.CreateException;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.training.examples.SalesEJB;
import com.training.examples.SalesEJBHome;
import com.training.examples.SalesSelection;
@author MShanmugham
To change the template for this generated type comment go to
Window&gt;Preferences&gt;Java&gt;Code Generation&gt;Code and Comments
public class GetSalesPage extends HttpServlet {
/* names of jsp pages */
private static final String SELECT_SALES_ORDER= "/GetSalesList.jsp";
// JNDI names
private static final String PREFIX = "java:comp/env/ejb/";
private static final String SALES_BEAN = "SalesEJB";
public static final String BYF_SALES_SELECTION = "byf_sales_selection";
public static final String BYF_SALES_LIST = "byf_sales_list";
public static final String BYF_ERROR_MESSAGE = "byf_error_message";
// class members
private RequestDispatcher dispatcher = null;
protected void doGet(
     HttpServletRequest request,
     HttpServletResponse response)
     throws ServletException, IOException {
     doPost(request, response);
protected void doPost(
     HttpServletRequest request,
     HttpServletResponse response)
     throws ServletException, IOException {
     HttpSession session = request.getSession(true);     
     if(request.getParameter("select") != null) {
          // select or GET_SALES event -> retrieve sales list, display 1. page
          getSalesList( request, session);
          dispatcher = request.getRequestDispatcher(SELECT_SALES_ORDER);  
          dispatcher.forward(request, response);
     private void getSalesList( HttpServletRequest request, HttpSession session) {
     try {
          // get bean SalesEJB
          InitialContext initialcontext = new InitialContext();
          SalesEJBHome salesHome = (SalesEJBHome) initialcontext.lookup( PREFIX + SALES_BEAN);
          SalesEJB sales = salesHome.create();
          // get flight list
          String salesOrg = (String) request.getParameter("salesOrg");
          String customerNo = (String) request.getParameter("customerNo");
          SalesSelection salesSelection = null;
          if( (salesOrg != null) && (customerNo != null)) {
               salesSelection = new SalesSelection( salesOrg, customerNo);
               session.setAttribute( BYF_SALES_SELECTION,salesSelection);
          } else {
               salesSelection = (SalesSelection) session.getAttribute( BYF_SALES_SELECTION);
          List salesList = sales.getSalesList(salesSelection);
          if( salesList == null) {
               request.setAttribute(BYF_ERROR_MESSAGE,"No records found!");
          // set session and request attribute
          session.setAttribute( BYF_SALES_SELECTION, salesSelection);
          session.setAttribute( BYF_SALES_LIST, salesList);
     }catch(NamingException exc) {
          request.setAttribute(BYF_ERROR_MESSAGE, "Couldn't access bean salesEJB: " + exc.getMessage());
     }catch(CreateException exc) {
          request.setAttribute(BYF_ERROR_MESSAGE, "Couldn't create bean salesEJB: " + exc.getMessage());
     }catch(RemoteException exc) {
          request.setAttribute(BYF_ERROR_MESSAGE, "Bean salesEJB returned error message: " + exc.detail.getMessage());
Here is the only JSP I am using GetSalesList.jsp
<%@ page language="java" %>
<%@ page import="com.training.examples.servlet.GetSalesPage"%>
<%@ page import="com.training.examples.SalesSelection"%>
<%@ page import="com.training.examples.salesData"%>
<%
  // get the sales order selection data and the list of selected Orders
  SalesSelection salesSelection = (SalesSelection) session.getAttribute( GetSalesPage.BYF_SALES_SELECTION);
  List salesList = (List) session.getAttribute( GetSalesPage.BYF_SALES_LIST);
  // get the error message
  String errorMessage = (String) request.getAttribute( GetSalesPage.BYF_ERROR_MESSAGE);
%>
<html>
     <head>
          <title> Fetch Orders </title>
     </head>
     <body>
          <fieldset>
          <legend>
               <b> Give the Sales Org and Customer Number </b>
          </legend>
<form action="<%= request.getContextPath() %>/servlet/GetSalesPage" method="POST">
Sales Organization:
<% if(salesSelection == null) { %>
     <input type="text" size="16" name="salesOrg" value="">
<% } else { %>
     <input type="text" size="16" name="salesOrg" value="<%= salesSelection.getSalesOrg() %>">
<% } %>
Customer Number:
<% if(salesSelection == null) { %>
     <input type="text" size="16" name="customerNo" value="">
<% } else { %>
     <input type="text" size="16" name="customerNo" value="<%= salesSelection.getCustomer() %>">
<% } %>
<br>
<br>
<input type="submit" name="select" value="Select">
<br>
<% if(salesList != null) { %>
<table border="1" box="all">
<tr>
<th rowspan="2">&nbsp</th>
<th rowspan="2">Sales Doc</th>
<th rowspan="2">Item No</th>
<th colspan="2">Material</th>
</tr>
<%     for(int i = 0; i < salesList.size(); i++) {  %>
     <tr>
          <td>
          <input type="radio" name="saleslist">
          </td>
               <td><%= ((salesData)salesList.get(i)).getSd_doc()   %></td>
               <td><%= ((salesData)salesList.get(i)).getItm_number() %></td>
               <td><%= ((salesData)salesList.get(i)).getMaterial() %></td>
               </tr>
          <br>
<%  } %>          
</table>
<br><br>
<input type="submit" name="continue" value="Continue">
</form>
<% } %>
<% if (errorMessage != null) { %>
   <br>
   <tr>
      <td colspan="3">
         <font color="#D00000"><b><%= errorMessage %></b></font>
      </td>
   </tr> 
<% } %>
          </fieldset>
          <p>
     </body>
</html>
Can you please help me out.
Murali.